Sorry. I have just the original Droid. No extra letters or numbers. The original box only specifies...Droid. I purchased it from Verizon about 3 mos. ago.
I'm w/ Verizon and the Droid that I have does wi-fi. It even has an app to find available wi-fi wherever you're at. And tells you if it is open or passworded. Signal strength, etc. At home, it automatically uses my wireless router. I'm very satisfied.
There are definitely 12-volt water heaters. Brands don't come to mind, but a google search should produce results.
As far as Chicago, I'm there pretty regularly and I always hate the traffic. I prefer to drive through at night, if possible.